• PhD in Urban and Environmental Engineering from Kyoto University, Kyoto, Japan (2007)
• MEng in Water and Wastewater Engineering from Asian Institute of Technology (AIT), Thailand  (2003)
• MEng in Civil Engineering from University of Moratuwa, Sri Lanka (2001)
• BSc Eng in Civil Engineering from University of Peradeniya, Sri Lanka (1999)

Current Affiliation:    

• Senior Lecturer Grade I attached to the Department of Civil and Environmental Engineering, Faculty of Engineering, University of Ruhuna (October, 2013 – to date)

Past Affiliations:

• Senior Lecturer Grade II attached to the Department of Civil and Environmental Engineering, Faculty of Engineering, University of Ruhuna (October, 2007 – 2013)
• Lecturer (Probationary) – Department of Civil and Environmental Engineering, Faculty of Engineering, University of Ruhuna (November, 2001 – October, 2007).
• Temporary Assistant Lecturer – Department of Civil and Environmental Engineering, Faculty of Engineering, University of Ruhuna (May, 2001 – November, 2001).
• Temporary Instructor – Department of Civil Engineering, University of Peradeniya (August, 1999 – March, 2000).

• Munbukagakasho Scholarship granted by the government of Japan to pursue PhD degree course at Kyoto University, Japan.
• Scholarship granted by the Government of the Netherlands to pursue M.Eng. degree course at Asian Institute of Technology,
• Scholarship granted by the Asian Development Bank (ADB) to pursue M.Eng. degree course at University of Moratuwa, Sri Lanka.
• 10^th Vice Chancellor’s award for the recipients of the highest research grant

• Corporate Member, Institution of Engineers, Sri Lanka (IESL) (C.Eng. MIE(SL))(M-6399)

• Water reclamation and reuse
• Groundwater, surface water and soil pollution
• Unsaturated-zone modeling
• Solid waste management
• Water quality modeling
• Landfill-leachate treatment
• Selection of appropriate solid waste landfill sites using GIS

• Infrastructure & Environment (Undergraduate Program – Semester 2); 2001, 2003 & 2004
• Water and Wastewater Engineering (Undergraduate Program – Semester 4); 2001,2003 and 2009,2013
• Solid Waste Management (Undergraduate Program – Semester 5); 2004 and 2009/2010
• Design of Steel and Timber Structures (Undergraduate Program – Semester 5); 2004
• Environmental Engineering Design (Undergraduate Program – Semester 7); 2007/2008, 2008/2009, 2009/2010, 2010/2011,2012,2013, 2014,2015
• Environmental Management (Undergraduate Program- Semester 8);2008, 2009,2010,2011,2012,2013,2014,2015

• Fundamentals of Civil Engineering (Undergraduate Program – Semester 1); 2010/2011,2012,2013
• Introduction to Civil Engineering(Undergraduate Program – Semester 1);2014,2015

• Core Member of SATREPS Program (Science and Technology Research Partnership for Sustainable Development) funded by JICA (Japan International Cooperation Agency) and JST (Japan Science and Technology Agency).
• Academic warden for female hostels (From 14^th November, 2013-to date)
• Laboratory in-charge of the Environmental Engineering Laboratory (October 2007 to date)
• Faculty member of Hambantota District Chamber of Commerce (HDCC) committee
• Publication committee chairperson of ACEPS (Advances in Civil and Environmental Engineering Practices for Sustainable Development) symposium – from 2015Secretary of REFTA (Ruhuna Engineering Faculty Teachers’ Association)- from 2015
• Faculty representative, Staff Development Center (SDC), University of Ruhuna (November, 2011 –2013).
• Faculty representative, Sports Advisory Board, University of Ruhuna (July, 2010 – December, 2010).
• Student Counsellor, Faculty of Engineering, University of Ruhuna (November, 2008- November, 2010)

Having been engaged in a number of consultancy work from October, 2007 to date.

Consultancies:

• Team leader of the EIA development project for the proposed Gin Nilwala Diversion Project (Client: Mahaweli Consultancy Bureau).
• Team leader of the IEE development project for the proposed sea-outfall for Koggala Exports Processing Zone {Client: Board of Investments (BOI) Sri Lanka}.
• Team leader of the EIA (Environmental Impact Assessment) development project for the proposed wastewater collection, treatment and disposal system for the Puttalam town (Client: Water Supply and Drainage Board).
• Team leader of the EIA (Environmental Impact Assessment) development project for the proposed wastewater collection, treatment and disposal system for the Chilaw town (Client: Water Supply and Drainage Board).
• Team leader of the EIA (Environmental Impact Assessment) development project for the proposed wastewater collection, treatment and disposal system for the greater Hambantota area (Client: Water Supply and Drainage Board).
• Team leader of the IEE (Initial Environmental Examination) development project for the proposed project of upgrading the sewerage facilities for the Kataragama sacred area (Client: Water Supply and Drainage Board).
• Team member of the IEE (Initial Environmental Examination) development project for Kirula Narahenpita sewer network (Client: Greater Colombo Water and Wastewater Management Improvement Program).
• Consulting Environmental Engineer, Evaluation of proposals submitted for upgrading the effluent and sewerage treatment plants of Hemas Consumer Brands Manufacturing Factory at Dankotuwa (Client: Hemas Consumer Brands, Dankotuwa, Sri Lanka)(2014).
• Consulting Environmental Engineer, Designing a treatment facility for Sulfur dioxide
  emission at the warehouse of SDC spices (Pvt) Ltd, Kosgoda (2014).
• Consulting Environmental Engineer, Designing an air pollution control system to
  prevent impacts of the crematorium of Batapola Cemetery on the Batapola Methodist Church (2012).
• Consulting Environmental Engineer, Investigating feasibility of implementing a waste-to-energy plant at Kaduwela solid waste dumpsite (Phase 1 and 2) {Client: National Building Research Organization (NBRO), Colombo 05}(2012-2013).
• Consulting Environmental Engineer, Evaluating the existing sewage disposal system of the students’ hostel at Jayalanka Rice Mill, Totagoda, Akmeemana (2011).
• Consulting Environmental Engineer for many Environmental Engineering related
  works at service stations, hospitals and industries from 2007 to date.

Books/Book Chapters:

• Co-author of the “Guide for sustainable planning, management and pollution control of waste landfill sites in Sri Lanka (2011-2016)”, Prepared by SATREPS Project (Science and Technology Research Partnership for Sustainable Development), June 2017.

Journal Papers:

• Dayanthi, W.K.C.N, Piyanu, P. & Kumara, K.K.P.S. 2023 Batch sorption experiments on low-cost composite adsorbent to treat total iron in landfill leachate. Water, Air & Soil Pollution 234:283. https://doi.org/10.1007/s11270-023-06291-y.
• Jayawardane, W.T.H. & Dayanthi, W.K.C.N. 2024 Waste-Derived Permeable Reactive Barrier to Treat Heavy Metals and Organic Matter in Groundwater Affected by Landfill Leachate. Environmental Earth Sciences (In press). Accepted on 18 th February 2024 for publication.
• Perera, G.R.Y. & Dayanthi, W.K.C.N. 2023 Low-cost treatment method for organic matter and nutrients in landfill leachate. Journal of Water and Health. Vol 21, No 6, 789. doi: 10.2166/wh.2023.014.
• Kumara, K.K.P.S. & Dayanthi, W.K.C.N. 2023 Waste materials composited into an adsorbent for landfill leachate treatment. Journal of Water and Health. Vol 21, No 12, 1871. https://doi.org/10.2166/wh.2023.310
• T. Shigematsu, W. K. C. N. Dayanthi, N. Yamashita, H. Tanaka and T. Yamashita (2008), “The first introduction of reclaimed wastewater to dry-farming field in Okinawa Island, Japan”, Water Science & Technology—WST, Vol 57, No 8, pp 1161–1167.
• W.K.C.N. Dayanthi, T. Shigematsu, H. Tanaka and N. Yamashita (2008), Dynamics of Nitrogenous Compounds in Laboratory Scale Soil Columns During Reclaimed Wastewater Irrigation: An application to Okinawa Island, Japan, Journal of Advances in Asian Environmental Engineering, Vol.7 (No.1),pp 21-28.
• W.K.C.N. Dayanthi, T. Shigematsu, H. Tanaka, N. Yamashita and J.E. Odencrantz (2008), Modeling Nitrogen Dynamics in a Soil Column with Reclaimed Water: Okinawa, Japan Application, Journal of Advances in Asian Environmental Engineering, Vol.7 (No.1),pp 61-70.
• T. Shigematsu, W.K.C.N. Dayanthi, N.Yamashita, Hiroaki Tanaka, Kouji Tsushima, Kunihiko Amano and Tadashi Yamashita (2006), Stable Isotope Analysis for Understanding Nitrogen Behavior in Soil Receiving Irrigation of Reclaimed Wastewater; Journal of Environmental Engineering Research (Japan), Vol. 43, pp. 509-516. https://doi.org/10.11532/proes1992.43.527
• W.K.C.N. Dayanthi, S.W. Jagoda and K.A.A. Hasini, “Laboratory Experiments on Remediation of Landfill Leachate Contamination with Permeable Reactive Barriers (PRBs) of Reactive Media Derived from Waste”; ‘ENGINEER’, The Journal of the Institution of Engineers, Sri Lanka, January, 2024, Vol. LVII, No. 01, 93-104.
• W.K.C.N. Dayanthi, I.U. Nagasinghe, H.R.D.G. Shanthapriya and W.G.G. Danushka; “Low-Cost Sequential Permeable Reactive Barrier (PRB) to Treat Groundwater Contaminated by Landfill- Leachate”; ‘ENGINEER’, The Journal of the Institution of Engineers, Sri Lanka, April, 2022, Vol. LV No. 2, pp 31-40.
• D. M. Kankanige, W. K. C. N. Dayanthi, I. U. Nagasinghe, A. M. Disanayaka and Ken Kawamoto; “Low-Cost Permeable Reactive Barrier (PRB) System to Treat the Organic Compounds and Nutrients in the Groundwater Contaminated by the Landfill-Leachate”; ‘ENGINEER’, The Journal of the Institution of Engineers, Sri Lanka, April 2019.
• I.U. Nagasinghe, W.K.C.N. Dayanthi, D. M. Kankanige, and A. M. Disanayaka; “Pilot-Scale Low-cost Mixed – Media Permeable Reactive Barrier (PRB) System to Treat Heavy Metals in the Groundwater Contaminated by Landfill-Leachate”; ‘ENGINEER’, The Journal of the Institution of Engineers, Sri Lanka, April, 2021, Vol. LIV No. 2, pp 33-42.
• Vinayakamoorththy. K and W.K.C.N. Dayanthi; “Batch sorption experiments on recycling building waste to treat Total iron in the landfill – leachate”; ‘ENGINEER’, The Journal of the Institution of Engineers, Sri Lanka, Vol. LII, No. 4, October 2019.
• BSR Nanayakkara, WKCN Dayanthi, HMLVK Herath, KHSS Tharanga and Ken Kawamoto; “Anaerobic Filter Treatment of Landfill-Leachate Using Low-Cost Filter Materials”; ‘ENGINEER’, The Journal of the Institution of Engineers, Sri Lanka, Vol. LIII, No. 1, January 2020.
• N.M.S. Wasanthi, W.K.C.N. Dayanthi, T.D.K. Chinthaka and W.G.S. Indunil, “Numerical simulation of below ground nitrate dynamics in soil columns subjected to reclaimed water”, J.Univ.Ruhuna 2016 4(1-2): 28-33,Volume 4 Number 1-2, September 2016. ISSN2345-9387

Theses:

• Analysis of below ground nitrate pollution due to reclaimed wastewater irrigation.
• Pre-treatment of municipal solid waste by enhanced leaching
• Prediction of dissolved oxygen in harbors using Artificial Neural Networks (ANN): A case study for the Port of Colombo.
• Comparison of different methods to calculate reference crop evapotranspiration.

Conferences:

• W.K.C.N. Dayanthi, T. Shigematsu, H. Tanaka, N. Yamashita, K. Kato, V. de Silva (2006). Utilization of Reclaimed Wastewater for Irrigation and Urban Activities in Okinawa Island, Japan; 79th Annual Technical Exhibition and Conference of Water Environment Federation (WEFTEC)(CD-ROM), Session 12, October 21-26, Dallas, Texas,75202 USA. DOI: 10.2175/193864706783749981
• W.K.C.N. Dayanthi, T. Shigematsu, H. Tanaka, N. Yamashita and J.E. Odencrantz (2007),Comparison of nitrogen dynamics in soil due to continuous and intermittent irrigation of reclaimed water: an application to Okinawa Island, Japan. 6th IWA (International Water Association) Specialist Conference on Wastewater Reclamation and Reuse for Sustainability (CD-ROM), Session of Agricultural Applications II, Antwerp, Belgium, October 9-12.
• W.K.C.N. Dayanthi, T. Shigematsu, H. Tanaka and N. Yamashita (2006), Nitrogenous Compounds Dynamics in Laboratory Scale Soil Columns under Reclaimed Wastewater Irrigation, 15th Joint KKNN (KAIST-KYOTO-NTU-NUS) Symposium on Environmental Engineering, Kyoto, Japan, June.
• W.K.C.N. Dayanthi, T. Shigematsu, H. Tanaka, N. Yamashita and J.E. Odencrantz (2007), Estimation of rate constants for nitrification and denitrification in a soil column irrigated with reclaimed water. 16th Joint KKNN (KAIST-KYOTO-NTU-NUS) Symposium on Environmental Engineering, Taipei, Taiwan, June.
• T. Shigematsu, W.K.C.N. Dayanthi, N. Yamashita, H. Tanaka and T. Yamashita (2007), The First Introduction of Reclaimed Wastewater to Dry-farming Fields in Okinawa Island, Japan. 6 th IWA (International Water Association) Specialist Conference on Wastewater Reclamation and Reuse for Sustainability (CD-ROM), Session of Agricultural Applications I, Antwerp, Belgium, October 9-12.
• T. Shigematsu, K. Tsushima, W.K.C.N. Dayanthi, N. Yamashita and H. Tanaka, Application of Isotope Analysis to Understand the Behavior of Nitrogen in Reclaimed Wastewater Through the Soil Column Experiment, Proceedings of the Water Environment Federation WEFTEC), California, USA, 2007(12):6119-6130. DOI: 10.2175/193864707787970043
• W.K.C.N. Dayanthi, C. Visvanathan, J. Trankler and P. Kuruparan (2004) Pretreatment of Domestic Solid Waste by Enhanced Leaching; APLAS Kitakyushu 2004, Third Asian-Pacific Landfill Symposium, October 27-29, Kitakyushu, Japan.
• W.K.C.N. Dayanthi, M. W. Jayaweera (2001), Prediction of Dissolved Oxygen in Harbours Using Artificial Neural Networks: An Application to the Port of Colombo; Proceedings of the 7th Annual Symposium of Engineering Research Unit (ERU), University of Moratuwa, Sri Lanka, November.
• Wasanthi, N. M. S., Dayanthi, W. K.C.N., Chinthaka, T. D. K. and Indunil, W. G. S., “Numerical Simulations for Nitrogen Dynamics in a Soil Column with Reclaimed Water”, Proceedings of the International Exchange Symposium on Sustainable infrastructure development in Asia,14-15 September 2009, Sri Lanka), pp. 175-180, ISBN978‐955‐1507‐12‐1.
• Abhayawardana G.P.R., Dayanthi W.K.C.N., Hapilan S., Kuhathasan A. and Perera
  S.V.A.D.R.R.; “Key Strategies for Efficient and Effective Solid Waste Management System for Galle Municipal Council Area”, Proceedings of IESL-SSMS Joint International Symposium on Social Management Systems, Colombo, Sri Lanka, pp 322-328,14 th-16th September 2011.
• K.H.V.V.Madushanka, W.K.C.N. Dayanthi, R. A. S. S.Rajapaksha, K. G.Rasanjana, M.S. Lakshika, B.N.D.D.S.B. Batagoda and A.W.N.S. Jayathunga; “Assessment of Spatial Variation in Water Quality: A Case Study at Three Surface Water Bodies in Galle Municipal Council Area”; Proceedings of International Symposium on Advances in Civil and Environmental Engineering Practices for Sustainable Development (ACEPS),Faculty of Engineering, University of Ruhuna, Galle, Sri Lanka, 19th March 2012.
• Ruwan K.D.B, Rathnayaka R.M.A.S.K, Dayanthi W.K.C.N., Edirisinghe D.D. and Priyankara N.H.; “Investigation of potential impacts on ground and surface water due to Galle municipal council dumpsite”; Proceedings of International Conference on Sustainable Built Environment 2012-Special Session-Water and Waste Management; Kandy;15th December 2012.
• Chathuranga A.G.O.A, Darshaka J.K.A.L, Wanshanatha A.G.A. and Dayanthi W.K.C.N.; “Selection of suitable sites for landfilling of solid wastes using GIS integrated with analytic hierarchy process (AHP): A case study for the Galle municipal council area”; Proceedings of the 4 th International Conference on Structural Engineering and Construction Management 2013; Kandy;13-15 December 2013.
• W.K.C.N. Dayanthi, M.A.N. Sandamali, J. Hara, M. Zhang, K. Kawamoto, J.A.I. Erangi and R.E.Weligala; “Development of a Landfill Site Selection Model Using GIS Integrated with Analytic Hierarchy Process (AHP): A Case Study for the Hambantota District of Sri Lanka”; Proceedings of 3rd International Symposium on Advances in Civil and Environmental Engineering Practices for Sustainable Development (ACEPS), Faculty of Engineering, University of Ruhuna, Galle, Sri Lanka, 9th March 2015.
• Dayanthi W.K.C.N., Ranga U.K.S. and Sajeevani H.K.M.; “Applicability of Low-Cost Organic Materials as Packing Media in Anaerobic Filters to Treat Landfill Leachate”; Transactions 2013, Institution of Engineers, Sri Lanka (IESL), Volume 1-Part B,pp-72-79, 2013.
• Dayanthi W.K.C.N., Jayalath M.S. and Gunawansha T.D.; “Applicability of Low-Cost Organic Materials as Reactive Media in Permeable Reactive Barriers (PRBs) to Treat Landfill-Leachate”; Transactions 2013, Institution of Engineers, Sri Lanka (IESL), Volume 1-Part B, 80-88,2013.
• Dayanthi W.K.C.N., Arthanayaka, A.M.C. Asiri K.K.V.L. and Malkanthi K.A.R.; “Applicability of Waste Matter as Reactive Media in Permeable Reactive Barriers (PRBs) to Treat Landfill-Leachate Contaminated Groundwater”; Transactions 2014, Institution of Engineers, Sri Lanka (IESL); Volume 1- Part B,pp-203-210, 2014.
• B.S.R. Nanayakkara, W.K.C.N. Dayanthi, V.P.H.S. Vidanapathirana and M.P. Siriwardana; “Up and Down- Flow Anaerobic Filters Using Firewood Charcoal, Dewatered Alum Sludge and Silica Sand for Landfill-Leachate Treatment”; Transactions 2014, Institution of Engineers, Sri Lanka (IESL); Volume 1-Part B,pp-197-202, 2014.
• W.K.C.N. Dayanthi, S.J.P. Shanthapriya, S.D. Nayomi, K. Kawamoto and M.A.N. Sandamali; “Laboratory-Scale Column Experiments of Waste Matters as Reactive Media in Permeable Reactive Barriers (PRBs) to Treat Groundwater Contaminated by Landfill-Leachate”; Transactions 2015, Institution of Engineers, Sri Lanka (IESL), Volume 1-Part B,pp-315-322, 2015.
• I.U. Nagasinghe and W. K. C. N Dayanthi; “Use of Waste Materials in Permeable Reactive Barriers (PRBs) to Treat Dissolved Organic Carbon in the Groundwater Contaminated by Landfill – Leachate”; Transactions 2018, Institution of Engineers, Sri Lanka (IESL), Volume 1-Part B, pp-379- 386, 2018.
• I.U. Nagasinghe and W. K. C. N Dayanthi; “Sorption experiments on heavy metal removal in contaminated groundwater by landfill-leachate using Permeable Reactive Barriers (PRBs) packed with waste materials”; Proceedings of 7 th International Symposium on Advances in Civil and Environmental Engineering Practices for Sustainable Development (ACEPS), Faculty of Engineering, University of Ruhuna, Galle, Sri Lanka, 17th October 2019 (pp 105-112).
• W.K.C.N. Dayanthi, M.A.N. Sandamali, M. Zhang, K. Kawamoto and J.; “GIS Model Integrated with Analytic Hierarchy Process (AHP) for Solid Waste Landfill Site Selection: A Case Study for the Southern Province of Sri Lanka”; Transactions 2015, Institution of Engineers, Sri Lanka (IESL); Volume 1-Part B,pp-307-314, 2015.
• Chathuranga W.G.O., Rathnasekara J.P.A.S., Dayanthi W.K.C.N., and Kawamoto K.; “Field – Scale Study on Treating the Groundwater Contaminated by Landfill-Leachate with Permeable Reactive Barriers (PRBs)”; 4th International Symposium on Advances in Civil and Environmental Engineering Practices for Sustainable Development (ACEPS-2016), Faculty of Engineering, University of Ruhuna, Galle, Sri Lanka, 3rd March 2016.
• D.M.T.P. Fernando, W.K.C.N. Dayanthi, K.G.D. Chamenuka, B.S.R. Nanayakkara and K. Kawamoto; “Field experiment on low-cost combined-media anaerobic filter system for the treatment of landfill-leachate”; Transactions 2017, Institution of Engineers, Sri Lanka (IESL); Volume 1-Part B,pp- 587-594, 2017.
• W.K.C.N Dayanthi, B S R Nanayakkara, K. Kawamoto, M.D.B.A. Premathilaka and O.V.N. Dulvin; “Field-Scale Study on Treating Landfill Leachate Using Anaerobic Filters Packed with Low-Cost Filter Media”; Transactions 2017, Institution of Engineers, Sri Lanka (IESL); Volume 1-Part B, pp-531-536, 2017.
• Branavan and W.K.C.N. Dayanthi; “Recycling Building Wastes and Dewatered Alum Sludge in Permeable Reactive Barriers (PRBs) to treat the Heavy Metals of the Ground Water Contaminated by Landfill-Leachate”; Transactions 2018, Institution of Engineers, Sri Lanka (IESL), Volume 1-Part B,pp- 363-370, 2018.
• T. Loganathan and W.K.C.N. Dayanthi; “Recycling Waste Materials in Permeable Reactive Barriers (PRBs) to Treat Organic Matter and Nutrients in Groundwater Contaminated by Landfill- Leachate”; Transactions 2019, Institution of Engineers, Sri Lanka (IESL), Volume 1-Part B, pp-371- 376, 2019.
• S.S.S. Fernando and W.K.C.N. Dayanthi; “Treatment of Dissolved Organic Matter and Total Iron in Landfill-Leachate by Recycling Building Wastes: Column Experiments”; Transactions 2019, Institution of Engineers, Sri Lanka (IESL), Volume 1-Part B, pp 419-425, 2019.
• G.L.P.M. Punyawardhana and W.K.C.N. Dayanthi;” Column experiment on recycling waste materials to treat dissolved organic matter and nutrients in landfill-leachate”; Proceedings of 7th International Symposium on Advances in Civil and Environmental Engineering Practices for Sustainable Development (ACEPS), Faculty of Engineering, University of Ruhuna, Galle, Sri Lanka, 17th October 2019.
• W.T.C. Udeshika and W.K.C.N. Dayanthi;” Composite adsorbent using waste materials to treat dissolved organic matter and nutrients in landfill-leachate”; Proceedings of 7th International Symposium on Advances in Civil and Environmental Engineering Practices for Sustainable Development (ACEPS), Faculty of Engineering, University of Ruhuna, Galle, Sri Lanka, 17th October 2019.
• W.R.A.U.Dilrukshi and W.K.C.N.Dayanthi; “Treating heavy metals in the groundwater contaminated by landfill-leachate using Permeable Reactive Barriers (PRBs) packed with building wastes and dewatered alum sludge”; Proceedings of 7th International Symposium on Advances in Civil and Environmental Engineering Practices for Sustainable Development (ACEPS), Faculty of Engineering, University of Ruhuna, Galle, Sri Lanka, 17th October 2019.
• K.A. Ahamed and W.K.C.N. Dayanthi; “Performance Evaluation of decentralized wastewater treatment plants in Sri Lanka”; 8th International Conference on Water and Flood Management (ICWFM 2021); 29-31 March 2021; Dhaka, Bangladesh.
• Edirisinghe D.D. and Priyankara N.H. and W.K.C.N. Dayanthi; “Preliminary solid waste management (SWM) data survey and assessment of town, treatment site and disposal site conditions: Case study southern province of Galle.”; Proceedings of International Conference on Sustainable Built Environment 2012-Special Session-Water and Waste Management; Kandy;15th December 2012.
• B.L.C.B. Balasooriya, N.H. Priyankara, A.M.N. Alagiyawanna, W.K.C.N. Dayanthi, T. Koide and K. Kawamoto, Waste Amount and Composition Survey (WACS) in Galle and Hambantota Municipal Councils, Proceedings of 3rd International Symposium on Advances in Civil and Environmental Engineering Practices for Sustainable Development (ACEPS), Faculty of Engineering, University of Ruhuna, Galle, Sri Lanka, 17th October 2015.
• Madhushainie, S.W. Seneviratne, W.K.C.N. Dayanthi; “Towards an Integrated Approach in Applying SEA and EIA in Sri Lanka”; Proceedings of 9 th International Symposium on Advances in Civil and Environmental Engineering Practices for Sustainable Development (ACEPS 2023), Faculty of Engineering, University of Ruhuna, Galle, Sri Lanka, October 2023.
• Wasanthi N. M. S., Dayanthi, W. K. C. N., Chinthaka, T. D. K.and Indunil W. G. S. “Numerical Simulations for Below Ground Nitrate Dynamics in Soil Columns Subject to Reclaimed Water”, Proceeding of seventh academic session, University of Ruhuna (18th March 2010, Faculty of Engineering, University of Ruhuna, Sri Lanka)
• K.H.V.V. Madushanka, R. A. S. S.Rajapaksha, K. G.Rasanjana, W.K.C. N. Dayanthi; “Variation of Water Quality Along MoragodaEla”; Proceedings of 09th Academic Sessions, University of Ruhuna, February 22, 2012.
• Chathura Arthanayaka, Asiri K.K.V.L., Malkanthi A.R. and Dayanthi W.K.C.N.; “Permeable Reactive Barriers for Landfill-Leachate Treatment”; Proceedings of 1st Annual Research Symposium (ARS-2014), Faculty of Engineering, University of Ruhuna, January 18, 2014.
• Nanayakkara B.S.R., Vidanapathirana V. P. H. S., Siriwardana M.P., Dayanthi W.K.C.N., Priyankara N.H., Alagiyawanna A.M.N.; “Landfill-leachate Treatment with Up-Flow Anaerobic Filters Packed with Waste Matters”; Proceedings of 1st Annual Research Symposium (ARS-2014), Faculty of Engineering, University of Ruhuna, January 18, 2014.
• J.A.I. Erangi, R. E. Weligala and W.K.C. N. Dayanthi; “Selection of Potential Sites for Sanitary Landfilling of Solid Wastes Using GIS and Analytical Hierarchical Process”; Proceedings of the 12th Academic Sessions, University of Ruhuna, March 4, 2015.
• Fernando D.M.T.P., Chamenuka K.G.D. and Dayanthi W.K.C.N.; “Field Scale Anaerobic Filter System with Low-Cost Filtration Media for the Treatment of Landfill- Leachate”; Proceedings of Annual Research Symposium (ARS)-2017, Faculty of Engineering, University of Ruhuna, January, 2017.
• HMLVK Herath, KHSS Tharanga, BSR Nanayakkara and WKCN Dayanthi; “Low-Cost Anaerobic Treatment Method for Landfill-Leachate”; Proceedings of Annual Research Symposium (ARS)-2017, Faculty of Engineering, University of Ruhuna, January, 2017.
• DM Kankanige, AM Disanayake, IU Nagasinghe and WKCN Dayanthi and WAP Asela; “Field – Scale Permeable Reactive Barrier (PRB) System with Low-Cost Reactive Materials to Treat Ground Water Contaminated by Landfill-Leachate”; Proceedings of 14th Academic Sessions, University of Ruhuna, March, 2017.
• Nanayakkara BSR and Dayanthi WKCN; “Landfill-Leachate Treatment in Up and Down Flow Anaerobic Filters with Combined Packing Media of Locally Available and Low-Cost Materials”; Proceedings of 14 th Academic Sessions, University of Ruhuna, March, 2017.
• Branavan and W.C.K.N. Dayanthi; “Batch Sorption Experiments on Recycling Building Wastes and Dewatered Alum Sludge as Reactive Packing Media in Permeable Reactive Barriers (PRBs) to Treat the Heavy Metals of the Groundwater Contaminated by Landfill-Leachate”; Proceedings of Annual Research Symposium (ARS)-2018, Faculty of Engineering, University of Ruhuna, January, 2018.
• K.P.A.H. Upasena and W.C.K.N. Dayanthi; “Batch Sorption Experiments on Recycling Building Wastes and Dewatered Alum Sludge as Reactive Packing Media in Permeable Reactive Barriers (PRBs) to Treat the Dissolved Organic Matter and Ammonia of the Groundwater Contaminated by Landfill-Leachate”; Proceedings of Annual Research Symposium (ARS)-2018, Faculty of Engineering, University of Ruhuna, January, 2018.
• P.A.A.T. Perera and W.C.K.N. Dayanthi; “Bench-Scale Experiment on Recycling Building Wastes and Dewatered Alum Sludge as Reactive Packing Media in Permeable Reactive Barriers (PRBs) to Treat the Heavy Metals of the Groundwater Contaminated by Landfill-Leachate”; Proceedings of Annual Research Symposium (ARS)-2018, Faculty of Engineering, University of Ruhuna, January, 2018.
• C.Y. Bandara and W.C.K.N. Dayanthi; “Bench-Scale Experiment on Recycling Building Wastes and Dewatered Alum Sludge as Reactive Packing Media in Permeable Reactive Barriers (PRBs) to Treat the Organic Compounds and Nutrients of the Groundwater Contaminated by Landfill-Leachate”; Proceedings of Annual Research Symposium (ARS)-2018, Faculty of Engineering, University of Ruhuna, January, 2018.
• M.A.I. Yogya and W.C.K.N. Dayanthi; “Laboratory-Scale Column Experiment on Recycling Building Wastes and Dewatered Alum Sludge as Reactive Packing Media in Permeable Reactive Barriers (PRBs) to Treat the Organic Compounds and Nutrients of the Groundwater Contaminated by Landfill-Leachate”; Proceedings of Annual Research Symposium (ARS)-2018, Faculty of Engineering, University of Ruhuna, January 2018.
• W.R.A.U. Dilrukshi and W.C.K.N. Dayanthi; “Laboratory-Scale Column Experiment on Recycling Building Wastes and Dewatered Alum Sludge as Reactive Packing Media in Permeable Reactive Barriers (PRBs) to Treat the Heavy Metals of the Groundwater Contaminated by Landfill-Leachate”; Proceedings of Annual Research Symposium (ARS)-2018, Faculty of Engineering, University o Ruhuna, January, 2018.
• G.R.Y. Perera and W.K.C.N. Dayanthi; “Low-cost Treatment Method for Organic Matter and Nutrients in Landfill Leachate-Batch Sorption Experiments”; Proceedings of Twenty Sixth International Forestry Environment Symposium 2021, 20th and 21st of January 2022, Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Gangodawila, Nugegoda, Sri Lanka.
• Hapilan, S.; Abhayawardana, G.P.R.; Kuhathasan, A.; Perera, S.V.A.D.R.R.; Dayanthi, W.K.C.N., Efficient and effective solid waste management system for Galle Municipality, 08th Academic Session – 2011University of Ruhuna, Matara, Sri Lanka, 2011-02-22.
• M. Zhang, J. Hara, T. Komai1, Y. Sakamoto, M. Vithanage, G.B.B. Herath, N.H. Priyankara, W.K.C.N. Dayanthi, and M.I.M. Mowjood, “Development of the Methodology for Site Selection of New Landfills in Sri Lanka”, Proceedings of the International Conference on Sri Lanka –Japan Collaborative Research (SLJCR) -2013; Faculty of Engineering, University of Peradeniya, Sri Lanka; 30th March 2013.
• K. Kawamoto, L.C. Kurukulasuriya, N.H. Priyankara, K.B.S.N. Jinadasa, C.S. Kalpage, G.B.B. Herath, M.I.M. Mowjood, W.K.C.N. Dayanthi, A.M.N. Alagiyawanna, S. Hamamoto, J. Yagisawa, S. Asamoto, T. Komatsu, N. Tanaka, M. Vithanage, S. Ratnayake, and L. Mangalika, “Development of Pollution Control and Environmental Restoration Techniques for Waste Landfill Sites in Sri Lanka”, Proceedings of the International Conference on Sri Lanka –Japan Collaborative Research (SLJCR) – 2013; Faculty of Engineering, University of Peradeniya, Sri Lanka; 30th March 2013.
• G.R.Y. Perera and W.K.C.N. Dayanthi; “Low-cost Treatment Method for Organic Matter and Nutrients in Landfill Leachate-Batch Sorption Experiments”; Proceedings of the 7th Annual Research Symposium (ARS)-2020, Faculty of Engineering, University of Ruhuna,9th October 2020.
• Thiyagaraja P., Pathirana D.K. and Dayanthi W.K.C.N. (2021) “Case study on efficiency of domestic wastewater treatment plants in western province of Sri Lanka”, Proceedings of 7th International Symposium on Advances in Civil and Environmental Engineering Practices for Sustainable Development (ACEPS), Faculty of Engineering, University of Ruhuna, Galle, Sri Lanka, 17th October 2019.
• W.K.C.N. Dayanthi; “Treatment of groundwater contaminated by landfill-leachate with waste matters as combined reactive media in sequential permeable reactive barriers (PRBs)’; Asian Network of Environment Research & Energy Symposium 2014 (A. NERGY-2014), University of Incheon, Republic of Korea from 20th to 22nd November 2014.
• W.K.C.N. Dayanthi, T. Shigematsu, H. Tanaka and N. Yamashita (2006), Laboratory Soil Column Study on Belowground Contaminant Dynamics due to Reclaimed Wastewater Irrigation, Proceedings of Japan Society on Water Environment (JSWE) Annual Meeting, Sendai, Japan, Vol.40, pp.101, March.
• W.K.C.N. Dayanthi, T. Shigematsu, H. Tanaka and N. Yamashita (2007), Simulated Rainwater Effects on Nitrate Dynamics in a Laboratory Soil Column Subjected to Long-Term Reclaimed Water Irrigation, Proceedings of Japan Society on Water Environment (JSWE) Annual Meeting, Osaka, Japan, Vol.41, pp.92, March.
• W. K. C. N. Dayanthi, H. R. D G. Shanthapriya, W. G. G. Danushka, K. Kawamoto and M.A.N. Sandamali; ”Treatment of groundwater contaminated by landfill-leachate with waste matter as combined reactive media in sequential permeable reactive barriers (PRB)”;International symposium of International Perspectives of Water Resources and Environment (IPWE), Colombo, Sri Lanka, 4-6 January 2016.
• Nanayakkara B.S.R., Vidanapathirana V.P.H.S., Siriwardana M.P., and Dayanthi W.K.C.N.; “Development of efficient packed-bed up-flow anaerobic filters using low-cost and locally available media to treat landfill-leachate”; Proceedings of the Special Session on Urban Water Environment Monitoring and Management, 4 th International Conference on Structural Engineering and Construction Management 2013; Kandy;13-15 December 2013, pp 85-93.
• Jayalath M.S., Gunawansha T.D and Dayanthi W.K.C.N.; “Low – Cost Media for Permeable Reactive Barriers to Treat Landfill – Leachate”; Proceedings of 10 th Academic Sessions, University of Ruhuna, March, 2013.
• Ranga U.K.S., Sajeevani H.K.M and Dayanthi W.K.C.N.; “Low – Cost Packing Media for Anaerobic Filters to Treat Landfill – Leachate”; Proceedings of 10 th Academic Sessions, University of Ruhuna, March, 2013.
• Ruwan K.D.B, Rathnayaka R.M.A.S.K, Dayanthi W.K.C.N.; “Impacts of Galle Municipal Council Dumpsite on Ground and Surface Water”; Proceedings of 10 th Academic Sessions, University of Ruhuna, March, 2013.
• W.K.C.N. Dayanthi, K.P.P. Dharmasena, K.P.P. Pathirana (1999), Comparison of Different Methods to Predict Reference Crop Evapotranspiration; Proceedings of the 55th Annual Sessions of SLAAS (Sri Lanka Association for the Advancement of Science), November.
• Dayanthi W.K.C.N., Jayalath M.S. and Gunawansha T.D.; “Treatment of organic matter in landfill – leachate by permeable reactive barriers (PRBs) with organic reactive media”; Proceedings of International Symposium on Advances in Civil and Environmental Engineering Practices for Sustainable Development (ACEPS), Faculty of Engineering, University of Ruhuna, Galle, Sri Lanka, 27th September 2013.
• Dayanthi W.K.C.N., Ranga U.K.S., Sajeevani H.K.M. and Kawamoto K.; “Up-flow Anaerobic Filters with Low-Cost Packing Media to Treat Landfill – Leachate”; Proceedings of the International Conference on Sri Lanka –Japan Collaborative Research (SLJCR) -2013; Faculty of Engineering, University of Peradeniya, Sri Lanka; 30th March 2013.